Improvement in door and window fastenings



H. BERGMAN. Door and Window Fastening.

No. 199,685. Patented Jan. 29,1878.

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ATTORNEYS. v

UNITED STATES 'PATENT OFFICE.

' HJALMAR BERGMAN, or STOOKHOLM, SWEDEN.

IMPROVEMENT IN DOOR AND WINDOW F ASTENINGS.

Specification forming part of Letters Patent N 0. 199,685, dated January29, 1878; application filed October 17, 1877.

To all whom it may concern:

Be it known that I, HJALMAR BERGMAN, of Stockholm, in Sweden, haveinvented a new and Improved Door and Window Look, of which the followingis a specification:

In the accompanying drawings, Figure 1 represents a sectional sideelevation of my improved door and window lock. Figs. 2, 3, and 4 arevertical, transverse, and horizontal sections of the same, thehorizontal sections being taken, respectively, on lines as w and 3/ y,Fig. 1. Fig. 5 is a front View of the recessed face-plate of the jamb.

The invention relates to and consists in a novel device bywhich the dooris pressed and tightly closed against the jamb also, in a peculiar latchor segmental bolt for holding the locking device in the requiredposition, all as hereinafter more fully described and claimed.

The construction and arrangementbf parts Figs. 1, 2, and 3, so as toretain thereby the @Iteferringf? to the drawings, A represents. asegmental bolti that is keyed to the spindle are as follows of 'myimproved door or window lock, which spindle is,operated by exteriorknobs, lever-handles, or other suitable devices. The bolt A is eitherthrown by turning theispindle into a mortise, a, of the door or windowjamb, or withdrawn therefromfaccording fas the door or window is tobe'jlclosed or opened. The mortise a is provided with a recessedface-plate, B, that may be accurately adjusted to the bolt by means ofslots and fastening-screws, to provide for any change in the door orwindow by the drying of the wood; or the face-plate may be directlyfastened to the jamb and supported by a flange in the re-.

latch, substantially in the manner and for the .cessed port-ion of thesame.

The face-flange'has a recess, 12, which has at that side against whichthe bolt bears a slight inward inclination, as shown in Fig. 5, so thatthe bolt, in closing, passes along the inclined side andpresses the dooror window inwardly,

Fig. 1. By turning the key in opposite direction, the latch is returnedinto the position shown by dotted lines, so as to admit the withdrawingof the bolt and the opening of the door.

The position and extent of motion of the latch O are controlled by aspring, d, that enters byaproj ection or tooth, d into the grooves d ofthe upper arm of the latch, as shown in latch whether it is thrown intoposition to bear on the bolt or to release the same.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The face-plate having a slot or recess, withinclined side or edge, to adapt it to cause a door to close tightly whenthe latch or bolt is turned or forced down, as shown and described. I

2. In a door and window lock, the combination of a segmental bolt of theknob-spindle with a fulcrumed latch, carried by a key over the bolt orclear of the same, the latch being lockedin either position by a toothedspring entering grooves of the upper arm of the purpose set forth.

. HJALMAR BERGMAN.

Witnesses:

EMIL WIDBERG,

L. A. GRoTH. v

